sudo 1.6.8 and other versions does not clear the PYTHONINSPECT environment variable, which allows limited local users to gain privileges via a Python script, a variant of CVE-2005-4158.
secunia.com/advisories/18358
secunia.com/advisories/18363
secunia.com/advisories/18549
secunia.com/advisories/18558
secunia.com/advisories/18906
secunia.com/advisories/19016
secunia.com/advisories/21692
slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.421822
www.debian.org/security/2006/dsa-946
www.mandriva.com/security/advisories?name=MDKSA-2006:159
www.novell.com/linux/security/advisories/2006_02_sr.html
www.securityfocus.com/bid/16184
www.trustix.org/errata/2006/0010
usn.ubuntu.com/235-2/